Effect of jackfruit seed extract (artocarpus heterophyllus) concentration on corrosion inhibition of galvanized steel in seawater

Sudirmansyah Lubis (Universitas Malikussaleh, Faculty of Engineering, Department of Materials Engineering, Bukit Indah, Lhokseumawe, 24355, Indonesia.)
Muhammad Sayuti (Universitas Malikussaleh, Faculty of Engineering, Department of Industrial Engineering, Bukit Indah, Lhokseumawe, 24355, Indonesia.)
Muhammad Muhammad (Universitas Malikussaleh, Faculty of Engineering, Department of Mechanical Engineering, Bukit Indah, Lhokseumawe, 24355, Indonesia.)
Rizka Mulyawan (Universitas Malikussaleh, Faculty of Engineering, Department of Chemical Engineering, Bukit Indah, Lhokseumawe, 24355, Indonesia.)
Nurul Islami (Universitas Malikussaleh, Faculty of Engineering, Department of Mechanical Engineering, Bukit Indah, Lhokseumawe, 24355, Indonesia.)

Jurnal Polimesin
Vol 23, No 1 (2025): February

This study confirms that immersion time and inhibitor concentration significantly affect the corrosion rate of galvanized steel in seawater. Without an inhibitor (0% concentration), the corrosion rate progressively increases, reaching a maximum of 0.4395 mpy after 30 days. In contrast, the addition of jackfruit seed extract effectively reduces corrosion, with the lowest rates observed at 0.0441 mpy (2%), 0.0330 mpy (4%), and 0.0192 mpy (6%) after 30 days. These results highlight the high efficiency of jackfruit seed extract as a natural corrosion inhibitor, demonstrating that higher concentrations and longer immersion times enhance corrosion protection. This study suggests that jackfruit seed extract is a viable, eco-friendly alternative to synthetic inhibitors, offering a sustainable solution for corrosion prevention in marine environments. Further research on long-term stability and large-scale applications is recommended to optimize its industrial implementation.